behavior of lower / upper alarm limit

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  • #8078
    Avatar123abc56
    Participant

    I notice some behavior of of lower/upper alarm limit that may be improved. not sure they are intended by design or bugs.

    Since 4 the limits can be left empty, that I though the empty ones will be consider as None, not being use to calculate stat nor triggering event.
    But on my test, the empty ones seem to be consider as 0, being use to calculate stat, but only not not triggering event.

    Case 1 : None,None,10,20
    when val is -1, the channel stat will become 11 and color will turn blue.
    no event (correct, as it should)

    Case 2 : -20,-10,None,None
    when val is 1, the channel stat will become 11 and color will turn red.
    no event (correct, as it should)

    Case 3 : 10,20,None,None
    when val is 15, the channel stat is still 13, lower limit not triggered
    no event, (but it should be low limit event)

    Case 4 : 10,20,999,999
    when val is 15, the channel stat is still 12, lower limit is triggered
    low limit event (correct, as it should be)

    Case 5 : -20,None,None,20
    when val is -1, the channel stat will become 12 and color will turn light blue.
    no event (correct, as it should)

    Currently, I filled in all 4 values as safe measures and workaround even though I just want to use 1 or 2 of them, such as:
    -20, -20, 20, 20 when only lower alarm limit and upper alarm limit needed
    -999,-999, 10, 20 when only upper limit and upper alarm limit needed
    10, 20, 999, 999 when only lower limit and lower alarm limit needed

    #8095
    MikhailMikhail
    Moderator

    Hi,

    Thank you for this question.

    Case 3 : 10,20,None,None

    In this case None and Node are equal to 0. That’s why limits are interpreted as incorrect and ignored. This behavior will be changed in Rapid SCADA 6.

    You should set some values instead of None.

    #8104
    Avatar123abc56
    Participant

    Case 5 : -20,None,None,20
    when val is -1, the channel stat will become 12 and color will turn light blue.
    no event (correct, as it should)

    In future version, if some limit is not set, not just the related event not appear, the related stat should not appear, considering other channel may use, is it?

    case like this, there should be only stat of 11,13,15.

    #8111
    MikhailMikhail
    Moderator

    If some limits are empty (null) they will not be converted to 0 and will not be checked at all.

    case like this, there should be only stat of 11,13,15

    Yes.

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